0355st parts

I have kept the component references as close as possible to ones used in the original schematics.

Resistors

Reference

Value

Tolerance

Rating

Notes

RV1

500 kΩ

–

0.25 W

Logarithmic potentiometer dual 24 mm M8

R3

10 MΩ

5 %

0.5 W

Carbon composition

R4

82 Ω

5 %

0.5 W

Carbon composition

R5

1 MΩ

5 %

0.5 W

Carbon composition

R6

6.8 kΩ

5 %

0.5 W

Carbon composition

R7

390 kΩ

5 %

0.5 W

Carbon composition

R8, R14

1 kΩ

5 %

0.5 W

Carbon composition

R9

22 kΩ

5 %

0.5 W

Carbon composition

R10

150 Ω

5 %

0.5 W

Carbon composition

R12

2.2 kΩ

5 %

0.5 W

Carbon composition

R13

560 Ω

5 %

3 W

Wire wound

R15, R16

33 Ω

5 %

3 W

Wire wound

I have kept (whenever possible) the same type of resistors as in the original: of carbon composition. But the rating has been chosen to be at least 0.5 W for carbon composition resistors because these are a little bigger than the 0.25 W ones, and more similar to the 1960 and earlier 0.25 W ones. In this way, even if there are a little too large for the power they need to dissipate, they will support a higher working voltage as the 0.25 W ones.

In case I couldn’t find a 0.5 W carbon composition resistor for a defined value, I could use a carbon film 1 W resistor instead.

The carbon composition resistors used are from the following manufacturers: